The exciter coil should OHM out at about 490. Make sure your meter range is set correctly, as this is the highest of the readings. If the range is too low, the meter will appear to read "nothing". If the settings check out, and still no reading, I would say time to replace the stator. You may also want to inspect the wire harness full length. If the red/white or Green/red are damaged somewhere along the line, you would get a similar reading....